Improved pump



UNITED STATES PATENT OFFICE.

NATHAN STEDMAN, OF AURORA, INDIANA, ASSIGNOR TO HIMSELF AND JOS. MILLER, OF SAME PLACE.

IMPROVED PUMP.

Specification forming part of Letters Patent No. 38,360, dated April 28, 1863.4

To all whom t may concern:

Be it known that I, NATHAN STEDMAN, of Aurora, in the county of Dearborn and State of Indiana, haveinvented anew and Improved Pump; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which* Figure 1 is a side view of my invention; Fig. 2, a vertical central section of the same.

Similar letters of reference indicate corresponding parts in the two figures.

This invention relates to an improvement lin that class of pumps which are provided with a tubular piston-rod to serve as a water-discharge pipe, and which pumps are submerged and used for domestic or household purposes.

The invention consists in the employment or use of a lever arranged in relation with the check-valves of the pump in such a manner that only one of the valves can remain closed at the same time, so that when the pump is stopped after use the water will be allowed to fall in the piston-rod or discharge-pipe until it reaches the level of the water in the well, and, consequently, fresh cool water obtained at once each time the pump is operated.

The invention further consists in a novel arrangement ofthe piston and valves, whereby a simple and efficient means is obtained for drawing into and forcing the water from the pump-chamber into the piston-rod or dis charge-pipe.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents the pump cylinder, which may be firmly secured to a block, B, inserted at or near the bottom of the well.

C is a water-passage, formed by a chamber or tube adjoining the cylinder A, and communicating with it at its upper end, as shown at a. The lower end of the passage O is provided with a puppet-valve, D, 'opening upward, and the bottom of the cylinder A is provided with a similar valve, E, which also opens upward.

F is a lever, which has its fulcrum-pin b passing through a pendant, c, at the lower end of cylinder A. This lever is curved upward at its ends, as shown at d d, said ends being in line with the bottoms of the stems e e of the valves D E, as shown in both figures. The stems e e of the valves D E are of such a length, or the ends d d of the lever F extend upward at such a height, that the two valves D E cannot hoth be in a closed state at the same time. When the valve D closes, the valve E must open, and vice versa, for when D falls the end of lever F under D is forced down by the `stem of the latter, and the opposite end of the lever will force upward valve E, and when E falls the end of the lever F under E will be forced down and valve D shoved upward, and in case one valve, D or E, partially falls, the other will partially rise, so that in any event, or in whatever position the piston Gr may beleft in when the pump is stopped, the water will be allowed to escape from the pump-cylinder through one or both of the valves, for the latter cannot be both closed at one and the same time. This willbe fully understood by referring to Figs. l and 2.

The piston G is a hollow cylinder, which works as snugly as may be in cylinder A with out creating any undue friction, and H is the piston-rod, whichis tubular, attached centrally to the'piston, and communicating with it by openings f. ithin the piston G there is placed a valve formed of two annular plates, g g', placed one above the other and connected by vertical rods h. The plates g g are allowed a certain degree of vertical play in the piston G, as will be seen by referring to Fig. 2, and the upper and lower ends ofthe piston are perforated with holes i, which are alternately covered by the plates g g', forming the valve of the piston. When the piston G is raised, the lower plate, g', of the piston-valve closes the hole i in the lower end ofthe piston, and a suction is formed in the cylinder A below the piston, the water passing up through valve E into the cylinder, while the water in the cylinder above the piston passes through the holes z' in the upper end of the cylinder, and around the edges of the upper plate, g, ot' the piston-valve and between the two plates g g into the tubular piston-rod H, through the upper end of which it is discharged. During .this movement ofthe piston G the valve D is kept closed by the pressure of the water upon it. As the piston descends a suction is produced in the upper` part of the cylinder above the piston, the water passing through valve D, up through the passage C into the cylinder. During this movement of the cylinder the holes t' in the upper end ot' the cylinder are elosed by the upper plate, g, ot' the piston-valve, and the water in the cylinder A below the piston G is forced up through the openings t' in the lower end of the piston 'and around the edges of the lower plate, g', of the piston-valve, and between the plates g g up through the tubular piston-rod H. Therdirection of the water when the piston ascends is 'indicated by red arrows, and by blue arrows when the piston descends.

The piston may be operated bya hand-lever, I, connected with the tubular piston-rod H, as shown in both figures.

From the above description it will be seen that a continuous stream is discharged from the tubular piston-rod H, and, as the two valves D E cannot in any event be both closed at the same time, the water in the piston-rod H will, when the pump is at rest, and immediately after use, be allowed to pass from the pump until the water in H reaches the level of the water in the well.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The lever F, when used in combination and placed in relation with the two valves D E ot' the pump, to operate in the manner and for the purpose herein set forth.

2. rEhe piston-valve formed ot' the two annular plates g g', eonneeted by vertical rods h, in combination with the holes i in the upper and lower ends of the piston G, and the tubular piston-rod H, all arranged for joint operation, as set forth.

NATHAN STEDMAN.

Witnesses:

JOSEPH MEuRrLL, Buownu H. CLARK. 

